Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 8188756 | Method for determining the electrical resistance of an electrical supply lead to sensor elements and a sensor arrangement The invention relates to a method for determining the electrical resistance of an electrical supply lead to sensor elements and concerns a sensor arrangement. The sensor elements are interconnected to form a sensor arrangement, and the electrical total resistance of... | 05/29/2012 |
| 8188757 | Method of controlling a shape memory alloy actuator utilizing resistance change A method of controlling a shape memory alloy actuator utilizing the change in resistance exhibited by the actuator over an actuation cycle, or a derivative thereof, to identify at least one event, such as, for example, a peak, valley, change in slope without reachin... | 05/29/2012 |
| 8159236 | Corona effluent sensing device The presently disclosed embodiments are directed to the detection and monitoring of corona effluent. The present embodiments pertain to a corona sensing device that employs a film of organic charge transporting material, as the active component in a corona effluent ... | 04/17/2012 |
| 8159237 | Grid sensor A grid sensor significantly reduces the complexity of a production process. The cost for installing and running the grid sensor are significantly reduced and the service life, pressure and heat resistance of the grid sensor can be significantly increased over previo... | 04/17/2012 |
| 8159235 | Electrical impedance tomography of nanoengineered thin films The present teachings relate to the application of electrical impedance tomography (EIT) to demonstrate the multifunctionality of carbon nanocomposite thin films under various types of environmental stimuli. Carbon nanotube (CNT) thin films are fabricated by a layer... | 04/17/2012 |
| 8143908 | Biosensor and a method of measuring a concentration of an analyte within a medium A biosensor for measuring a concentration of an analyte within a medium includes an electrical charge storage and a resistive layer including an electrical resistance which changes upon contact with the analyte. The electrical charge storage includes a sensor electr... | 03/27/2012 |
| 8134376 | Method of measuring electronic device and measuring apparatus In a method for measuring an electronic device which is an object to be measured, a passive element is connected to the electronic device in parallel, and electric parameters of the electronic device are extracted by measuring an impedance of the entire circuit.... | 03/13/2012 |
| 8049521 | Solar parametric testing module and processes Embodiments of the present invention generally relate to a module that can test and analyze various regions of a solar cell device in an automated or manual fashion after one or more steps have been completed in the solar cell formation process. The module used to p... | 11/01/2011 |
| 8022717 | Thermal pre-scanning of electric circuits using thermally-trimmable resistors There is described a method to change the value of a thermally-trimmable resistor in a non-permanent way by raising the temperature of the thermally-trimmable resistor to a level that is somewhere between room temperature and trimming temperature. By doing this, the... | 09/20/2011 |
| 7948246 | Electronic device utilizing impedance and/or resistance identification to identify an accessory device A device and method for identifying an accessory device connected to a first port and a second port of an electronic device by determining an impedance of the accessory device across the first port and the second port is provided. The electronic device generally inc... | 05/24/2011 |
| 7944218 | Immersion sensor to protect battery A system for detecting liquid on a battery or on an electronic device connected with the battery is presented. The battery has an electrical contact for transferring current from the battery to the electronic device. The system includes a sensor for detecting liquid... | 05/17/2011 |
| 7919970 | Device, method and system for estimating the termination to a wired transmission-line based on determination of characteristic impedance A system and method for measuring a characteristic impedance of a transmission-line comprises transmitting energy to the line, and shortly after measuring the voltage/current involved and thus measuring the equivalent impedance. The measured characteristic impedance... | 04/05/2011 |
| 7911214 | Electrical resistance measurement method and component inspection process An electrical resistance measurement method and a component inspection process to which the electrical resistance measurement method is applied. In the first step, a measuring object, for example, one pair of zinc-plated steel plates on which surfaces films are form... | 03/22/2011 |
| 7872479 | Leak testing and leak localization arrangement for leak testing and leak localization for flat roofs or the like In a leak testing and leak localization arrangement for leak testing and localization for flat roofs or the like which are sealed by at least one electrically insulating sealing web (6), at least one voltage source (12) is applied between an upper side... | 01/18/2011 |
| 7872480 | Gas sensor control apparatus A gas sensor control apparatus for controlling a gas sensor includes a resistance detection unit and a heater control unit. The resistance detection unit detects a resistance of an object cell of the gas sensor. When the resistance of the object cell is lower than a... | 01/18/2011 |
| 7816928 | Determination of equivalent series resistance A determination of an equivalent series resistance (ESR) effect for high frequency filtering performance of a filtered feed-through assembly is described. A low frequency signal is introduced to a filtered feed-through assembly. ESR limit of the filtered feed-throug... | 10/19/2010 |
| 7808256 | Electrical resistance measuring device for tires, and method thereof To provide a resistance measuring device not requiring a long time for the resistance measurement work of a tire and maintaining the accuracy of measurement to assure the electrical conductivity characteristics of the tire and a method thereof. An electrical ... | 10/05/2010 |
| 7772854 | High-conductivity contacting-type conductivity measurement An improved contacting-type conductivity measurement system and method are provided. A first conductivity measurement is obtained by driving a contacting-type conductivity sensor with an excitation voltage at a first frequency, a second conductivity is obtained by d... | 08/10/2010 |
| 7683642 | Apparatus and method for metering contact integrity An arrangement for use in connection with an electricity meter includes an electricity meter housing and at least one connection between a first conductor and a second conductor carrying line voltage. The arrangement further includes a processing circuit that is con... | 03/23/2010 |
| 7667469 | Method and apparatus for dry testing non-conductive containers for carrying people A method and apparatus for dry testing non-conductive containers for carrying people are disclosed. Two conductive materials placed on opposite sides of a material being tested. High voltage is applied to one of the conductive materials while a ground lead is attach... | 02/23/2010 |
| 7652490 | Measuring device for measuring the state of oils or fats A measuring device is used to measure the state of a liquid product which is to be measured, in particular oil or fat. Said measuring device comprises a housing, a hollow connecting element which is secured therein and a carrier which is applied to the opposite end ... | 01/26/2010 |
| 7635985 | Test pattern for analyzing delay characteristic of interconnection line and method for analyzing delay characteristic of interconnection line using the same A test pattern for analyzing a delay characteristic of an interconnection line and a method of analyzing a delay characteristic of an interconnection line using the test pattern are provided. The test pattern for analyzing a delay characteristic of an interconnectio... | 12/22/2009 |
| 7629800 | Water level measurement system The present invention relates to an apparatus to measure water level in a water reservoir by measuring electrical conductivity between electrodes, including a reference electrode, at least one measuring electrode projecting into the water reservoir, and at least one... | 12/08/2009 |
| 7629799 | NIP width sensing system and method for elevated temperature environments A system for measuring nip width for a nip present between two rolls includes: (a) a sensor assembly; (b) a resistance-measuring unit that measures an electrical resistance; (c) first and second leads, the first lead being connected to a first strip of the sensor as... | 12/08/2009 |
| 7616013 | Micromechanical positional state sensing apparatus method and system A micromechanical device may include one or more piezoresistive elements whose electrical resistance changes in response to externally or internally induced strain. The present invention leverages the piezoresistive properties of such devices to sense the positional... | 11/10/2009 |
| 7609073 | Methods and devices for measuring volume resistivity A device for measuring the volume resistivity of materials and method of measuring are disclosed. The device for measuring has a receptacle of a known volume in which fluid materials, for example powdered or granular materials which may assume the shape of the recep... | 10/27/2009 |
| 7583093 | Electrical test method of an integrated circuit A method for testing an integrated circuit is provided comprising steps of providing at least one first conductive path stretching along an element of the integrated circuit, applying a voltage at a point of the first conductive path, performing a first measurement ... | 09/01/2009 |
| 7564248 | Method and apparatus for monitoring fuel cells Methods and apparatus are provided for monitoring a coolant conductivity of a fuel cell supplying power via positive and negative buses. The method includes measuring a first voltage of the positive bus, measuring a second voltage of the negative bus, applying a res... | 07/21/2009 |
| 7538563 | Determination of equivalent series resistance A determination of an equivalent series resistance (ESR) effect for high frequency filtering performance of a filtered feed-through assembly is described. A low frequency signal is introduced to a filtered feed-through assembly. ESR limit of the filtered feed-throug... | 05/26/2009 |
| 7525323 | Method for measuring permeability of a ferromagnetic material in an integrated circuit A method for determining consistency of a permeability of a ferromagnetic material in integrated circuits in which a test strip of the subject ferromagnetic material is included for testing with an impedance measurement instrument, such as an inductance-capacitance-... | 04/28/2009 |
| 7521943 | Device, method and system for estimating the termination to a wired transmission-line based on determination of characteristic impedance A system and method for measuring a characteristic impedance of a transmission-line comprises transmitting energy to the line, and shortly after measuring the voltage/current involved and thus measuring the equivalent impedance. The measured characteristic impedance... | 04/21/2009 |
| 7511515 | System for providing power over communication cable having mechanism for determining resistance of communication cable Novel system and methodology for determining resistance of wires in a communication cable having at least two pairs of wires used for providing power from a power supply device to a powered device. A measuring mechanism may determine DC resistance of the wires befor... | 03/31/2009 |
| 7443177 | Characterization of conductor by alternating current potential-drop method with a four-point probe A method of determining material parameters associated with a conductor using four points includes injecting and extracting alternating current into the plate using current-carrying wires operatively connected to two of the four points, measuring potential drop betw... | 10/28/2008 |
| 7427905 | Temperature controlled MEMS resonator and method for controlling resonator frequency There are many inventions described and illustrated herein. In one aspect, the present invention is directed to a temperature compensated microelectromechanical resonator as well as fabricating, manufacturing, providing and/or controlling microelectromechanical reso... | 09/23/2008 |
| 7417443 | Determination of effective resistance between a power sourcing equipment and a powered device A method of determining an effective resistance between a power sourcing equipment and a powered device, the powered device exhibiting an interface and an operational circuitry, the method comprising: prior to connecting power to the operational circuitry of the pow... | 08/26/2008 |
| 7417442 | Method and apparatus for testing tunnel magnetoresistive effect element, manufacturing method of tunnel magnetoresistive effect element and tunnel magnetoresistive effect element A method for testing a TMR element includes a step of measuring a plurality of resistances of the TMR element by feeding a plurality of sense currents with different current values each other through the TMR element, a step of calculating a ratio of change in resist... | 08/26/2008 |
| 7405578 | Device for monitoring the contact integrity of a joint The invention relates to a device that can be used to monitor the contact integrity of a joint that is of an impervious contact surface between two parts (4 and 5) including a set of conductive patterns (8) which are distributed over the two con... | 07/29/2008 |
| 7401014 | Method for order selection in passive transmission line macromodels based on the lie criteria A passive macromodel for lossy, dispersive multiconductor transmission lines uses a multiplicative approximation of the matrix exponential known as the Lie product. The circuit implementation of the macromodel is a cascade of elementary cells, each cell being the co... | 07/15/2008 |
| 7391224 | Sensor arrangement The invention relates to planar sensor arrangements, in particular seat mat sensors, for recognition of seat occupancy in a motor vehicle, comprising several pressure sensitive sensor elements, arranged in a planar distribution, the electrical properties of which ar... | 06/24/2008 |
| 7388387 | Method and apparatus for measurement of electrical resistance An electronic circuit and method to determine a resistance value of a resistive element. The circuit includes a current source coupled in series with the resistive element. The current source is configured to force a predetermined value of current through the resist... | 06/17/2008 |
